Feature

Venezuela’s Manpower

New Machines and Gadgets

Nature Ramblings: Christmas Trees

Front Matter

Phobias Keep Some Single

Arthritis and Fluoridation

Wound Healing Begins as Soon as Damage Done

Common Origin for Race Riots, Fashion Changes

Hospitals Are Too Noisy for Good Heart Diagnosis

TB Germ Makes Poison

Life Span Same in Space as on Earth

[Photograph]: Ground Level Bail-out